US5460876AExpiredUtility
Magnetic recording medium
Est. expiryNov 5, 2012(expired)· nominal 20-yr term from priority
B05D 7/5485B05D 1/265G11B 5/716G11B 5/848Y10T428/26Y10T428/265
29
PatentIndex Score
0
Cited by
7
References
5
Claims
Abstract
A magnetic recording medium is disclosed. The magnetic recording medium is produced by coating the following magnetic paints on a support in the order from the support, a lower layer magnetic paint having a creep strain of 20% to 1000% determined in the conditions with non-volatile content of the paint of 30 weight percent, a temperature 20° C., and a loading weight of 1 Pascal, and an upper layer magnetic paint having a creep strain of 10% to 500% determined in the same conditions.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A magnetic recording medium produced by coating the following magnetic paints on a support in the following order starting with said support a first magnetic paint, forming a lower layer, having a creep strain of 20% to 1000% when said first paint has a non-volatile content NV of 30% by weight at a temperature of 20° C. and a loading weight of 1 Pascal, and a second magnetic paint, forming an upper layer, having a second creep strain of 10% to 500% when said second paint has an NV of 30% by weight at said temperature and said loading weight.
2. The medium of claim 1, wherein said upper layer and lower layer are simultaneously coated on said support.
3. The medium of claim 1, wherein said upper layer has a dry thickness of from 0.01 μm to 0.5 μm.
4. The medium of claim 1, wherein said lower layer has a dry thickness of from 0.5 μm to 6.0 μm.
5. The medium of claim 1, wherein said upper layer and lower layer are coated on said support by a extrusion coater.Cited by (0)
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